Ventilator.



W. P. WARDEN.

VENTILATOR. APPLICATION FILED FEB. 1, 1907.

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Patented Dec. 1, 1908.

WILLIAM F. WARDEN,'OF AKRON, OHIO.

- VENTILATOR.

Specification of Letters Patent.

. Patented Dec. 1, 1908.

Application filed February 1, 1907. Serial No. 355,261.

This invention relates to ventilators of the general type shown in United States Letters Patent, No. 767,512 granted to Akers & Harpham, July 2, 1901, and the objects thereof are to produce a ventilator of the type named embodying means for guiding the sleeve during its movements to close the ventilator, means for suitably sustaining the sleeve when lowered to open the same and means for sustaining the roof structure.

The invention therefore, primarily resides in constructlng a ventilator of the type named so that the general usefulness andefliciency are greatly increased without making the same complex or diflicult of manufacture or use.

A practical embodiment of my invention is illustrated in the drawings in which similar reference numerals indicate like parts in the different figures.

In the drawln s, Figure 1 is a central, vertical section 0 my improved ventilator; and, Fig. 2 a plan view of the sleeve used in closing the same.

In the drawings, the reference numeral, 1 designates the flue of the ventilator which is preferably arranged to be located in the roof of the structure for which ventilation is sought. The upper portion of this flue 1 is provided with an outwardly-flaring portion 2 constitutin an outwardly-extending shoulder. Extending upwardly from the flue are a plurality of roof braces 3 each comprising two upright portions 1 and 5, a bottom brace connecting the two, designated in the drawings by the reference nu- Ineral 6, and an inclined top brace 7. On'

the top portions 7 of these braces is a conically-formed roof 8 having a tip at its apex, designated by the reference numeral 9. This tip 9 is preferably provided with a threaded opening. Awind shield 10 is arranged to inclose the top of the flue 1 and the bottom of the roof 8 and be united tothe upright portions 5 of the roof brackets. Attached to the exterior of the upright portions 4; of the roof brackets are a plurality of annular louvers 11, and below the shoulder 2 of the flue is another louver 12 all used for the common purpose of deflecting the air and preventing the entrance of foreign substances into the flue. In order to close the space existing between the top of the flue l and the under side of the roof 8 there is placed in the flue l a sleeve 13 arranged to be drawn upwardly until it encounters the roof '8 thereby closing the air passage existing between the flue and roof and when lowered into the position shown in Fig. 1, the space already described is opened to permit the egress of air from the structure ventilated by this device. Experience has demonstrated that in some ventilators, and especially those of great size, it is necessary to provide some means for guiding the sleeve when it is raised so as to maintain it properly in position and prevent its tilting in such a manner as to prevent its ready movement. In order to overcome this difliculty the following mechanism is employed:

Extending across the bottom of the flue 1 are a plurality of bars 1 1 from which extends upwardly a pipe or similar device 15 preferably exteriorly-threaded to engage in the opening in the tip 9 and be thereby secured in position. Extending across the space inclosed by the sleeve 13 are a plurality of bars 16 preferably meeting at the center and provided with an opening 17 to inclose the pipe 15. It will be seen from the drawings that there are two sets of these bars 16, one set at the top and the other at the bottom of the sleeve, so that while sliding on the pipe 15 all danger of the sleeve tilting or getting out of position is eliminated. In order to raise the sleeve there is placed in the upper portion of the pipe 15 a pulley 18 over which a rope or'similar device is passed from the upper set of bars 16 around the pulley and down into the apartment ventilated by this device.

It will be seen from the foregoing that as the sleeve rises it closes the space between the top of the flue and the under face of the roof, and the pipe affords a simple and absolutely satisfactory means for its guidance.

In order to afford an eflectual means for preventing the sleeve descending too far into the flue 1 there is formed on the top, outer face thereof a flange 19 which is of such a diameter as to engage and rest between the shoulder 2 formed at the top of the flue. In order to strengthen the structure I provide a plurality of braces 20 extending from the outside of the flue 1 to the point of union between the braces 6 and the upright portions 5 and secured in position by such means asrivets. These braces 20 will be spaced apart at approximately equal distances around the structure and the number employed will. be governed by the weight of the flue and the amount of strain to which it will. be; sub.- jected.

It will be apparent from the foregoing de' scription that a ventilator constructed as set out in the foregoing description is remarkably strong, due to the peculiar method of constructing the roof braces which strengthen each other and securely hold the roof in position, the several parts of each brace being so related to the remainder that breakage or collapsing of the structure is substantially impossible.

hat I claim and desire to secure by Letters Patent, is':

A ventilator comprising. a flue communieating with an inclosed space to be ventilated and having an outwardly and upwardly inclined top edge constituting a shoulder, a roof for the flue,rsaid roof spaced from the flue forming thereby an air passage between the top edge of the flue and the roof to permit of the egress of air from the inclosed space to be ventilated, a vertically-shiftable sleeve normally within said flue and adapted when. shifted in one direction to abut against the inner face of the roof thereby closing the airspace between the roof and the top edge of the flue to prevent the egress of air 111 said flue and the entrance of foreign matter therein, said sleeve at its top provided with a laterally extending annular flange adapted to engage said shoulder whereby the downward movement of the sleeve is arrested, a vertieally-extending rod having the lower end thereof supported by the flue and its upper end connected with the roof, means carried by the sleeve and surrounding said rod for guiding the sleeve when moving ineither direction, a louver surrounding the flue and having its top edge abutting against the lower face of the inclined upper portion of the flue, and means for elevating and lowering the sleeve.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

VILLIAM F'. WAR-DEB.

lVitnesses GLENARA Fox, C. E. HUMPHRnY. 

